Experience is added as a string instead of a number

[GitJohnFis]

Bug

In script.js, when a monster is defeated, the experience (exp) variable is incremented with the monster's name (a string) instead of their level (a number). This causes experience to become a string, which breaks experience tracking and related calculations.

Problematic code:
exp += monsters[fighting].name;

Expected behavior:
Experience should be increased by the monster's level (a number), e.g.:
exp += monsters[fighting].level;

Steps to Reproduce

1. Defeat a monster in the game.
2. Check the experience value displayed or in the console.
3. Notice that the value is a string and not incrementing as expected.

Suggested Fix

Update the relevant line to add the monster's level to the experience:
exp += monsters[fighting].level;

Additional Context

This is an easy and impactful fix for new contributors!

[adarshdotdev]

I'll do it